To see what exists is

 To have become to see what exists means that you have become to live in the world by your own will.

 Things of the world are not made or changed by human beliefs or ideals. The basics of life are to look at things that exist in the world as they are and to judge and act. When you see exactly what exists, you can see how you can accomplish what you want. In other words, you can live your life according to your own will.